Sulfide - Nomenclature. 1  The systematic names sulfanediide and sulfide (2â), valid IUPAC names, are determined according to the substitutive and additive nomenclatures, respectively.
Nuclear proliferation is the spread of nuclear weapons, fissionable material, and weapons-applicable nuclear technology and information to nations not recognized as Nuclear Weapon States by the Treaty on the Non-Proliferation of Nuclear Weapons, also known as the Nuclear Non-Proliferation Treaty or NPT.
Full Answer. Of the eight, or possibly nine, countries that are known to possess nuclear warheads, only five are legally allowed to do so under the Nuclear Non-Proliferation Treaty (NPT). These five countries are the United States, Russia, China, France and the United Kingdom.